Polyamine Homeostasis in Tomato Biotic/Abiotic Stress Cross-Tolerance.

Polyamine Homeostasis in Tomato Biotic/Abiotic Stress Cross-Tolerance. Gene. 2019 Nov 16;:144230 Authors: Tsaniklidis G, Pappi P, Tsafouros A, Charova SN, Nikoloudakis N, Roussos PA, Paschalidis KA, Delis C Abstract Adverse conditions and biotic strain can lead to significant losses and impose limitations on plant yield. Polyamines (PAs) serve as regulatory molecules for both abiotic/biotic stress responses and cell protection in unfavourable environments. In this work, the transcription pattern of 24 genes orchestrating PA metabolism was investigated in Cucumber Mosaic Virus or Potato Virus Y infected and cold stressed tomato plants. Expression analysis revealed a differential/pleiotropic pattern of gene regulation in PA homeostasis upon biotic, abiotic or combined stress stimuli, thus revealing a discrete response specific to diverse stimuli: (i) biotic stress-influenced genes, (ii) abiotic stress-influenced genes, and (iii) concurrent biotic/abiotic stress-regulated genes. The results support different roles for PAs against abiotic and biotic stress. The expression of several genes, significantly induced under cold stress conditions, is mitigated by a previous viral infection, indicating a possible priming-like mechanism in tomato plants pointing to crosstalk among stress signalling. Several genes and resulting enzymes of PA catabolism were stimulated upon viral infection. Hence, we suggest that PA catabolism resulting in elevated...
Source: Gene - Category: Genetics & Stem Cells Authors: Tags: Gene Source Type: research